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Class D Switching Power Amplifiers and Power D/A conversion

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Old 16th May 2012, 09:51 AM   #21
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You don't need to worry about grounding issues. Just earth the meanwell unit as usual.
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Old 16th May 2012, 01:17 PM   #22
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Quote:
Just earth the meanwell unit as usual.
Well that's the issue. What's "usual"? I've never earthed anything in my life....

Edit: Do you mean connecting back to the "earth" of the mains socket? Is it necessary to ground the chassis for safety as per this diagram?

Or is that only necessary for a linear supply?

Last edited by samadhi; 16th May 2012 at 01:39 PM.
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Old 16th May 2012, 02:31 PM   #23
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The Meanwell unit has three input connections from the mains AC: Live, Neutral, Eath.

It has two DC output connections: V+ (positive DC), and V- (return DC).

Actually there are three sets of each DC output to allow for easy wiring of multiple recipients (at the same voltage).

Have faith. Its simple. No humming issues with mine. No need to earth amp unit itself. Have a look at the picture.

Meanwell NES 350W 36V
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Old 16th May 2012, 02:33 PM   #24
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In Denmark where I live, I can only connect Live and Neutral. What to do with earth?
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Old 16th May 2012, 03:05 PM   #25
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Quote:
Originally Posted by dublin78 View Post
The Meanwell unit has three input connections from the mains AC: Live, Neutral, Eath.

It has two DC output connections: V+ (positive DC), and V- (return DC).

Actually there are three sets of each DC output to allow for easy wiring of multiple recipients (at the same voltage).

Have faith. Its simple. No humming issues with mine. No need to earth amp unit itself. Have a look at the picture.

Meanwell NES 350W 36V
Thanks Michael,

That does seem pretty straight forward. I may give this a go after all.
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Old 16th May 2012, 03:05 PM   #26
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I am not sure.

Ignore it?

Other non-earthers may offer advice.
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Old 16th May 2012, 03:37 PM   #27
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I'm now thinking of going the whole hog and building with the T4 using the SMPS300R 48V 230V power supply.

Is it more risky using the naked psu over the meanwell? It looks like it has screw input and output connections as well?
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Old 16th May 2012, 04:17 PM   #28
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Go for it.

It is all plug and play really. So long as the modules are covered up for normal use, the "nakedness" will make no difference.

Good luck
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